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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/acpi.h>
13#include <linux/delay.h>
14#include <linux/i2c.h>
15#include <linux/iio/events.h>
16#include <linux/iio/iio.h>
17#include <linux/interrupt.h>
18#include <linux/irq.h>
19#include <linux/iio/sysfs.h>
20#include <linux/mutex.h>
21#include <linux/pm.h>
22#include <linux/pm_runtime.h>
23
24#define US5182D_REG_CFG0 0x00
25#define US5182D_CFG0_ONESHOT_EN BIT(6)
26#define US5182D_CFG0_SHUTDOWN_EN BIT(7)
27#define US5182D_CFG0_WORD_ENABLE BIT(0)
28#define US5182D_CFG0_PROX BIT(3)
29#define US5182D_CFG0_PX_IRQ BIT(2)
30
31#define US5182D_REG_CFG1 0x01
32#define US5182D_CFG1_ALS_RES16 BIT(4)
33#define US5182D_CFG1_AGAIN_DEFAULT 0x00
34
35#define US5182D_REG_CFG2 0x02
36#define US5182D_CFG2_PX_RES16 BIT(4)
37#define US5182D_CFG2_PXGAIN_DEFAULT BIT(2)
38
39#define US5182D_REG_CFG3 0x03
40#define US5182D_CFG3_LED_CURRENT100 (BIT(4) | BIT(5))
41#define US5182D_CFG3_INT_SOURCE_PX BIT(3)
42
43#define US5182D_REG_CFG4 0x10
44
45
46
47
48
49
50
51#define US5182D_REG_UDARK_TH 0x27
52#define US5182D_REG_DARK_AUTO_EN 0x2b
53#define US5182D_REG_AUTO_LDARK_GAIN 0x29
54#define US5182D_REG_AUTO_HDARK_GAIN 0x2a
55
56
57#define US5182D_REG_PXL_TH 0x08
58#define US5182D_REG_PXH_TH 0x0a
59
60#define US5182D_REG_PXL_TH_DEFAULT 1000
61#define US5182D_REG_PXH_TH_DEFAULT 30000
62
63#define US5182D_OPMODE_ALS 0x01
64#define US5182D_OPMODE_PX 0x02
65#define US5182D_OPMODE_SHIFT 4
66
67#define US5182D_REG_DARK_AUTO_EN_DEFAULT 0x80
68#define US5182D_REG_AUTO_LDARK_GAIN_DEFAULT 0x16
69#define US5182D_REG_AUTO_HDARK_GAIN_DEFAULT 0x00
70
71#define US5182D_REG_ADL 0x0c
72#define US5182D_REG_PDL 0x0e
73
74#define US5182D_REG_MODE_STORE 0x21
75#define US5182D_STORE_MODE 0x01
76
77#define US5182D_REG_CHIPID 0xb2
78
79#define US5182D_OPMODE_MASK GENMASK(5, 4)
80#define US5182D_AGAIN_MASK 0x07
81#define US5182D_RESET_CHIP 0x01
82
83#define US5182D_CHIPID 0x26
84#define US5182D_DRV_NAME "us5182d"
85
86#define US5182D_GA_RESOLUTION 1000
87
88#define US5182D_READ_BYTE 1
89#define US5182D_READ_WORD 2
90#define US5182D_OPSTORE_SLEEP_TIME 20
91#define US5182D_SLEEP_MS 3000
92#define US5182D_PXH_TH_DISABLE 0xffff
93#define US5182D_PXL_TH_DISABLE 0x0000
94
95
96static const int us5182d_scales[] = {188500, 107800, 61000, 33600, 19600, 7600,
97 3900, 2100};
98
99
100
101
102
103static u16 us5182d_dark_ths_vals[] = {170, 200, 512, 512, 800, 2000, 4000,
104 8000};
105
106enum mode {
107 US5182D_ALS_PX,
108 US5182D_ALS_ONLY,
109 US5182D_PX_ONLY
110};
111
112enum pmode {
113 US5182D_CONTINUOUS,
114 US5182D_ONESHOT
115};
116
117struct us5182d_data {
118 struct i2c_client *client;
119 struct mutex lock;
120
121
122 u32 ga;
123
124
125 u8 lower_dark_gain;
126 u8 upper_dark_gain;
127 u16 *us5182d_dark_ths;
128
129 u16 px_low_th;
130 u16 px_high_th;
131
132 int rising_en;
133 int falling_en;
134
135 u8 opmode;
136 u8 power_mode;
137
138 bool als_enabled;
139 bool px_enabled;
140
141 bool default_continuous;
142};
143
144static IIO_CONST_ATTR(in_illuminance_scale_available,
145 "0.0021 0.0039 0.0076 0.0196 0.0336 0.061 0.1078 0.1885");
146
147static struct attribute *us5182d_attrs[] = {
148 &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
149 NULL
150};
151
152static const struct attribute_group us5182d_attr_group = {
153 .attrs = us5182d_attrs,
154};
155
156static const struct {
157 u8 reg;
158 u8 val;
159} us5182d_regvals[] = {
160 {US5182D_REG_CFG0, US5182D_CFG0_WORD_ENABLE},
161 {US5182D_REG_CFG1, US5182D_CFG1_ALS_RES16},
162 {US5182D_REG_CFG2, (US5182D_CFG2_PX_RES16 |
163 US5182D_CFG2_PXGAIN_DEFAULT)},
164 {US5182D_REG_CFG3, US5182D_CFG3_LED_CURRENT100 |
165 US5182D_CFG3_INT_SOURCE_PX},
166 {US5182D_REG_CFG4, 0x00},
167};
168
169static const struct iio_event_spec us5182d_events[] = {
170 {
171 .type = IIO_EV_TYPE_THRESH,
172 .dir = IIO_EV_DIR_RISING,
173 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
174 BIT(IIO_EV_INFO_ENABLE),
175 },
176 {
177 .type = IIO_EV_TYPE_THRESH,
178 .dir = IIO_EV_DIR_FALLING,
179 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
180 BIT(IIO_EV_INFO_ENABLE),
181 },
182};
183
184static const struct iio_chan_spec us5182d_channels[] = {
185 {
186 .type = IIO_LIGHT,
187 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
188 BIT(IIO_CHAN_INFO_SCALE),
189 },
190 {
191 .type = IIO_PROXIMITY,
192 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
193 .event_spec = us5182d_events,
194 .num_event_specs = ARRAY_SIZE(us5182d_events),
195 }
196};
197
198static int us5182d_oneshot_en(struct us5182d_data *data)
199{
200 int ret;
201
202 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
203 if (ret < 0)
204 return ret;
205
206
207
208
209
210 ret = ret | US5182D_CFG0_ONESHOT_EN;
211
212 return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
213}
214
215static int us5182d_set_opmode(struct us5182d_data *data, u8 mode)
216{
217 int ret;
218
219 if (mode == data->opmode)
220 return 0;
221
222 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
223 if (ret < 0)
224 return ret;
225
226
227 ret = ret & ~US5182D_OPMODE_MASK;
228 ret = ret | (mode << US5182D_OPMODE_SHIFT);
229
230
231
232
233
234
235 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
236 if (ret < 0)
237 return ret;
238
239 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_MODE_STORE,
240 US5182D_STORE_MODE);
241 if (ret < 0)
242 return ret;
243
244 data->opmode = mode;
245 msleep(US5182D_OPSTORE_SLEEP_TIME);
246
247 return 0;
248}
249
250static int us5182d_als_enable(struct us5182d_data *data)
251{
252 int ret;
253 u8 mode;
254
255 if (data->power_mode == US5182D_ONESHOT) {
256 ret = us5182d_set_opmode(data, US5182D_ALS_ONLY);
257 if (ret < 0)
258 return ret;
259 data->px_enabled = false;
260 }
261
262 if (data->als_enabled)
263 return 0;
264
265 mode = data->px_enabled ? US5182D_ALS_PX : US5182D_ALS_ONLY;
266
267 ret = us5182d_set_opmode(data, mode);
268 if (ret < 0)
269 return ret;
270
271 data->als_enabled = true;
272
273 return 0;
274}
275
276static int us5182d_px_enable(struct us5182d_data *data)
277{
278 int ret;
279 u8 mode;
280
281 if (data->power_mode == US5182D_ONESHOT) {
282 ret = us5182d_set_opmode(data, US5182D_PX_ONLY);
283 if (ret < 0)
284 return ret;
285 data->als_enabled = false;
286 }
287
288 if (data->px_enabled)
289 return 0;
290
291 mode = data->als_enabled ? US5182D_ALS_PX : US5182D_PX_ONLY;
292
293 ret = us5182d_set_opmode(data, mode);
294 if (ret < 0)
295 return ret;
296
297 data->px_enabled = true;
298
299 return 0;
300}
301
302static int us5182d_get_als(struct us5182d_data *data)
303{
304 int ret;
305 unsigned long result;
306
307 ret = us5182d_als_enable(data);
308 if (ret < 0)
309 return ret;
310
311 ret = i2c_smbus_read_word_data(data->client,
312 US5182D_REG_ADL);
313 if (ret < 0)
314 return ret;
315
316 result = ret * data->ga / US5182D_GA_RESOLUTION;
317 if (result > 0xffff)
318 result = 0xffff;
319
320 return result;
321}
322
323static int us5182d_get_px(struct us5182d_data *data)
324{
325 int ret;
326
327 ret = us5182d_px_enable(data);
328 if (ret < 0)
329 return ret;
330
331 return i2c_smbus_read_word_data(data->client,
332 US5182D_REG_PDL);
333}
334
335static int us5182d_shutdown_en(struct us5182d_data *data, u8 state)
336{
337 int ret;
338
339 if (data->power_mode == US5182D_ONESHOT)
340 return 0;
341
342 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
343 if (ret < 0)
344 return ret;
345
346 ret = ret & ~US5182D_CFG0_SHUTDOWN_EN;
347 ret = ret | state;
348
349 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
350 if (ret < 0)
351 return ret;
352
353 if (state & US5182D_CFG0_SHUTDOWN_EN) {
354 data->als_enabled = false;
355 data->px_enabled = false;
356 }
357
358 return ret;
359}
360
361
362static int us5182d_set_power_state(struct us5182d_data *data, bool on)
363{
364 int ret;
365
366 if (data->power_mode == US5182D_ONESHOT)
367 return 0;
368
369 if (on) {
370 ret = pm_runtime_resume_and_get(&data->client->dev);
371 } else {
372 pm_runtime_mark_last_busy(&data->client->dev);
373 ret = pm_runtime_put_autosuspend(&data->client->dev);
374 }
375
376 return ret;
377}
378
379static int us5182d_read_value(struct us5182d_data *data,
380 struct iio_chan_spec const *chan)
381{
382 int ret, value;
383
384 mutex_lock(&data->lock);
385
386 if (data->power_mode == US5182D_ONESHOT) {
387 ret = us5182d_oneshot_en(data);
388 if (ret < 0)
389 goto out_err;
390 }
391
392 ret = us5182d_set_power_state(data, true);
393 if (ret < 0)
394 goto out_err;
395
396 if (chan->type == IIO_LIGHT)
397 ret = us5182d_get_als(data);
398 else
399 ret = us5182d_get_px(data);
400 if (ret < 0)
401 goto out_poweroff;
402
403 value = ret;
404
405 ret = us5182d_set_power_state(data, false);
406 if (ret < 0)
407 goto out_err;
408
409 mutex_unlock(&data->lock);
410 return value;
411
412out_poweroff:
413 us5182d_set_power_state(data, false);
414out_err:
415 mutex_unlock(&data->lock);
416 return ret;
417}
418
419static int us5182d_read_raw(struct iio_dev *indio_dev,
420 struct iio_chan_spec const *chan, int *val,
421 int *val2, long mask)
422{
423 struct us5182d_data *data = iio_priv(indio_dev);
424 int ret;
425
426 switch (mask) {
427 case IIO_CHAN_INFO_RAW:
428 ret = us5182d_read_value(data, chan);
429 if (ret < 0)
430 return ret;
431 *val = ret;
432 return IIO_VAL_INT;
433 case IIO_CHAN_INFO_SCALE:
434 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
435 if (ret < 0)
436 return ret;
437 *val = 0;
438 *val2 = us5182d_scales[ret & US5182D_AGAIN_MASK];
439 return IIO_VAL_INT_PLUS_MICRO;
440 default:
441 return -EINVAL;
442 }
443}
444
445
446
447
448
449
450
451
452
453
454static int us5182d_update_dark_th(struct us5182d_data *data, int index)
455{
456 __be16 dark_th = cpu_to_be16(data->us5182d_dark_ths[index]);
457 int ret;
458
459 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH,
460 ((u8 *)&dark_th)[0]);
461 if (ret < 0)
462 return ret;
463
464 return i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH + 1,
465 ((u8 *)&dark_th)[1]);
466}
467
468
469
470
471
472
473
474
475
476static int us5182d_apply_scale(struct us5182d_data *data, int index)
477{
478 int ret;
479
480 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
481 if (ret < 0)
482 return ret;
483
484 ret = ret & (~US5182D_AGAIN_MASK);
485 ret |= index;
486
487 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG1, ret);
488 if (ret < 0)
489 return ret;
490
491 return us5182d_update_dark_th(data, index);
492}
493
494static int us5182d_write_raw(struct iio_dev *indio_dev,
495 struct iio_chan_spec const *chan, int val,
496 int val2, long mask)
497{
498 struct us5182d_data *data = iio_priv(indio_dev);
499 int ret, i;
500
501 switch (mask) {
502 case IIO_CHAN_INFO_SCALE:
503 if (val != 0)
504 return -EINVAL;
505 for (i = 0; i < ARRAY_SIZE(us5182d_scales); i++)
506 if (val2 == us5182d_scales[i]) {
507 mutex_lock(&data->lock);
508 ret = us5182d_apply_scale(data, i);
509 mutex_unlock(&data->lock);
510 return ret;
511 }
512 break;
513 default:
514 return -EINVAL;
515 }
516
517 return -EINVAL;
518}
519
520static int us5182d_setup_prox(struct iio_dev *indio_dev,
521 enum iio_event_direction dir, u16 val)
522{
523 struct us5182d_data *data = iio_priv(indio_dev);
524
525 if (dir == IIO_EV_DIR_FALLING)
526 return i2c_smbus_write_word_data(data->client,
527 US5182D_REG_PXL_TH, val);
528 else if (dir == IIO_EV_DIR_RISING)
529 return i2c_smbus_write_word_data(data->client,
530 US5182D_REG_PXH_TH, val);
531
532 return 0;
533}
534
535static int us5182d_read_thresh(struct iio_dev *indio_dev,
536 const struct iio_chan_spec *chan, enum iio_event_type type,
537 enum iio_event_direction dir, enum iio_event_info info, int *val,
538 int *val2)
539{
540 struct us5182d_data *data = iio_priv(indio_dev);
541
542 switch (dir) {
543 case IIO_EV_DIR_RISING:
544 mutex_lock(&data->lock);
545 *val = data->px_high_th;
546 mutex_unlock(&data->lock);
547 break;
548 case IIO_EV_DIR_FALLING:
549 mutex_lock(&data->lock);
550 *val = data->px_low_th;
551 mutex_unlock(&data->lock);
552 break;
553 default:
554 return -EINVAL;
555 }
556
557 return IIO_VAL_INT;
558}
559
560static int us5182d_write_thresh(struct iio_dev *indio_dev,
561 const struct iio_chan_spec *chan, enum iio_event_type type,
562 enum iio_event_direction dir, enum iio_event_info info, int val,
563 int val2)
564{
565 struct us5182d_data *data = iio_priv(indio_dev);
566 int ret;
567
568 if (val < 0 || val > USHRT_MAX || val2 != 0)
569 return -EINVAL;
570
571 switch (dir) {
572 case IIO_EV_DIR_RISING:
573 mutex_lock(&data->lock);
574 if (data->rising_en) {
575 ret = us5182d_setup_prox(indio_dev, dir, val);
576 if (ret < 0)
577 goto err;
578 }
579 data->px_high_th = val;
580 mutex_unlock(&data->lock);
581 break;
582 case IIO_EV_DIR_FALLING:
583 mutex_lock(&data->lock);
584 if (data->falling_en) {
585 ret = us5182d_setup_prox(indio_dev, dir, val);
586 if (ret < 0)
587 goto err;
588 }
589 data->px_low_th = val;
590 mutex_unlock(&data->lock);
591 break;
592 default:
593 return -EINVAL;
594 }
595
596 return 0;
597err:
598 mutex_unlock(&data->lock);
599 return ret;
600}
601
602static int us5182d_read_event_config(struct iio_dev *indio_dev,
603 const struct iio_chan_spec *chan, enum iio_event_type type,
604 enum iio_event_direction dir)
605{
606 struct us5182d_data *data = iio_priv(indio_dev);
607 int ret;
608
609 switch (dir) {
610 case IIO_EV_DIR_RISING:
611 mutex_lock(&data->lock);
612 ret = data->rising_en;
613 mutex_unlock(&data->lock);
614 break;
615 case IIO_EV_DIR_FALLING:
616 mutex_lock(&data->lock);
617 ret = data->falling_en;
618 mutex_unlock(&data->lock);
619 break;
620 default:
621 ret = -EINVAL;
622 break;
623 }
624
625 return ret;
626}
627
628static int us5182d_write_event_config(struct iio_dev *indio_dev,
629 const struct iio_chan_spec *chan, enum iio_event_type type,
630 enum iio_event_direction dir, int state)
631{
632 struct us5182d_data *data = iio_priv(indio_dev);
633 int ret;
634 u16 new_th;
635
636 mutex_lock(&data->lock);
637
638 switch (dir) {
639 case IIO_EV_DIR_RISING:
640 if (data->rising_en == state) {
641 mutex_unlock(&data->lock);
642 return 0;
643 }
644 new_th = US5182D_PXH_TH_DISABLE;
645 if (state) {
646 data->power_mode = US5182D_CONTINUOUS;
647 ret = us5182d_set_power_state(data, true);
648 if (ret < 0)
649 goto err;
650 ret = us5182d_px_enable(data);
651 if (ret < 0)
652 goto err_poweroff;
653 new_th = data->px_high_th;
654 }
655 ret = us5182d_setup_prox(indio_dev, dir, new_th);
656 if (ret < 0)
657 goto err_poweroff;
658 data->rising_en = state;
659 break;
660 case IIO_EV_DIR_FALLING:
661 if (data->falling_en == state) {
662 mutex_unlock(&data->lock);
663 return 0;
664 }
665 new_th = US5182D_PXL_TH_DISABLE;
666 if (state) {
667 data->power_mode = US5182D_CONTINUOUS;
668 ret = us5182d_set_power_state(data, true);
669 if (ret < 0)
670 goto err;
671 ret = us5182d_px_enable(data);
672 if (ret < 0)
673 goto err_poweroff;
674 new_th = data->px_low_th;
675 }
676 ret = us5182d_setup_prox(indio_dev, dir, new_th);
677 if (ret < 0)
678 goto err_poweroff;
679 data->falling_en = state;
680 break;
681 default:
682 ret = -EINVAL;
683 goto err;
684 }
685
686 if (!state) {
687 ret = us5182d_set_power_state(data, false);
688 if (ret < 0)
689 goto err;
690 }
691
692 if (!data->falling_en && !data->rising_en && !data->default_continuous)
693 data->power_mode = US5182D_ONESHOT;
694
695 mutex_unlock(&data->lock);
696 return 0;
697
698err_poweroff:
699 if (state)
700 us5182d_set_power_state(data, false);
701err:
702 mutex_unlock(&data->lock);
703 return ret;
704}
705
706static const struct iio_info us5182d_info = {
707 .read_raw = us5182d_read_raw,
708 .write_raw = us5182d_write_raw,
709 .attrs = &us5182d_attr_group,
710 .read_event_value = &us5182d_read_thresh,
711 .write_event_value = &us5182d_write_thresh,
712 .read_event_config = &us5182d_read_event_config,
713 .write_event_config = &us5182d_write_event_config,
714};
715
716static int us5182d_reset(struct iio_dev *indio_dev)
717{
718 struct us5182d_data *data = iio_priv(indio_dev);
719
720 return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG3,
721 US5182D_RESET_CHIP);
722}
723
724static int us5182d_init(struct iio_dev *indio_dev)
725{
726 struct us5182d_data *data = iio_priv(indio_dev);
727 int i, ret;
728
729 ret = us5182d_reset(indio_dev);
730 if (ret < 0)
731 return ret;
732
733 data->opmode = 0;
734 data->power_mode = US5182D_CONTINUOUS;
735 data->px_low_th = US5182D_REG_PXL_TH_DEFAULT;
736 data->px_high_th = US5182D_REG_PXH_TH_DEFAULT;
737
738 for (i = 0; i < ARRAY_SIZE(us5182d_regvals); i++) {
739 ret = i2c_smbus_write_byte_data(data->client,
740 us5182d_regvals[i].reg,
741 us5182d_regvals[i].val);
742 if (ret < 0)
743 return ret;
744 }
745
746 data->als_enabled = true;
747 data->px_enabled = true;
748
749 if (!data->default_continuous) {
750 ret = us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
751 if (ret < 0)
752 return ret;
753 data->power_mode = US5182D_ONESHOT;
754 }
755
756 return ret;
757}
758
759static void us5182d_get_platform_data(struct iio_dev *indio_dev)
760{
761 struct us5182d_data *data = iio_priv(indio_dev);
762
763 if (device_property_read_u32(&data->client->dev, "upisemi,glass-coef",
764 &data->ga))
765 data->ga = US5182D_GA_RESOLUTION;
766 if (device_property_read_u16_array(&data->client->dev,
767 "upisemi,dark-ths",
768 data->us5182d_dark_ths,
769 ARRAY_SIZE(us5182d_dark_ths_vals)))
770 data->us5182d_dark_ths = us5182d_dark_ths_vals;
771 if (device_property_read_u8(&data->client->dev,
772 "upisemi,upper-dark-gain",
773 &data->upper_dark_gain))
774 data->upper_dark_gain = US5182D_REG_AUTO_HDARK_GAIN_DEFAULT;
775 if (device_property_read_u8(&data->client->dev,
776 "upisemi,lower-dark-gain",
777 &data->lower_dark_gain))
778 data->lower_dark_gain = US5182D_REG_AUTO_LDARK_GAIN_DEFAULT;
779 data->default_continuous = device_property_read_bool(&data->client->dev,
780 "upisemi,continuous");
781}
782
783static int us5182d_dark_gain_config(struct iio_dev *indio_dev)
784{
785 struct us5182d_data *data = iio_priv(indio_dev);
786 int ret;
787
788 ret = us5182d_update_dark_th(data, US5182D_CFG1_AGAIN_DEFAULT);
789 if (ret < 0)
790 return ret;
791
792 ret = i2c_smbus_write_byte_data(data->client,
793 US5182D_REG_AUTO_LDARK_GAIN,
794 data->lower_dark_gain);
795 if (ret < 0)
796 return ret;
797
798 ret = i2c_smbus_write_byte_data(data->client,
799 US5182D_REG_AUTO_HDARK_GAIN,
800 data->upper_dark_gain);
801 if (ret < 0)
802 return ret;
803
804 return i2c_smbus_write_byte_data(data->client, US5182D_REG_DARK_AUTO_EN,
805 US5182D_REG_DARK_AUTO_EN_DEFAULT);
806}
807
808static irqreturn_t us5182d_irq_thread_handler(int irq, void *private)
809{
810 struct iio_dev *indio_dev = private;
811 struct us5182d_data *data = iio_priv(indio_dev);
812 enum iio_event_direction dir;
813 int ret;
814 u64 ev;
815
816 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
817 if (ret < 0) {
818 dev_err(&data->client->dev, "i2c transfer error in irq\n");
819 return IRQ_HANDLED;
820 }
821
822 dir = ret & US5182D_CFG0_PROX ? IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING;
823 ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, IIO_EV_TYPE_THRESH, dir);
824
825 iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
826
827 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0,
828 ret & ~US5182D_CFG0_PX_IRQ);
829 if (ret < 0)
830 dev_err(&data->client->dev, "i2c transfer error in irq\n");
831
832 return IRQ_HANDLED;
833}
834
835static int us5182d_probe(struct i2c_client *client,
836 const struct i2c_device_id *id)
837{
838 struct us5182d_data *data;
839 struct iio_dev *indio_dev;
840 int ret;
841
842 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
843 if (!indio_dev)
844 return -ENOMEM;
845
846 data = iio_priv(indio_dev);
847 i2c_set_clientdata(client, indio_dev);
848 data->client = client;
849
850 mutex_init(&data->lock);
851
852 indio_dev->info = &us5182d_info;
853 indio_dev->name = US5182D_DRV_NAME;
854 indio_dev->channels = us5182d_channels;
855 indio_dev->num_channels = ARRAY_SIZE(us5182d_channels);
856 indio_dev->modes = INDIO_DIRECT_MODE;
857
858 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CHIPID);
859 if (ret != US5182D_CHIPID) {
860 dev_err(&data->client->dev,
861 "Failed to detect US5182 light chip\n");
862 return (ret < 0) ? ret : -ENODEV;
863 }
864
865 if (client->irq > 0) {
866 ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
867 us5182d_irq_thread_handler,
868 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
869 "us5182d-irq", indio_dev);
870 if (ret < 0)
871 return ret;
872 } else
873 dev_warn(&client->dev, "no valid irq found\n");
874
875 us5182d_get_platform_data(indio_dev);
876 ret = us5182d_init(indio_dev);
877 if (ret < 0)
878 return ret;
879
880 ret = us5182d_dark_gain_config(indio_dev);
881 if (ret < 0)
882 goto out_err;
883
884 if (data->default_continuous) {
885 ret = pm_runtime_set_active(&client->dev);
886 if (ret < 0)
887 goto out_err;
888 }
889
890 pm_runtime_enable(&client->dev);
891 pm_runtime_set_autosuspend_delay(&client->dev,
892 US5182D_SLEEP_MS);
893 pm_runtime_use_autosuspend(&client->dev);
894
895 ret = iio_device_register(indio_dev);
896 if (ret < 0)
897 goto out_err;
898
899 return 0;
900
901out_err:
902 us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
903 return ret;
904
905}
906
907static int us5182d_remove(struct i2c_client *client)
908{
909 struct us5182d_data *data = iio_priv(i2c_get_clientdata(client));
910
911 iio_device_unregister(i2c_get_clientdata(client));
912
913 pm_runtime_disable(&client->dev);
914 pm_runtime_set_suspended(&client->dev);
915
916 return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
917}
918
919#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM)
920static int us5182d_suspend(struct device *dev)
921{
922 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
923 struct us5182d_data *data = iio_priv(indio_dev);
924
925 if (data->power_mode == US5182D_CONTINUOUS)
926 return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
927
928 return 0;
929}
930
931static int us5182d_resume(struct device *dev)
932{
933 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
934 struct us5182d_data *data = iio_priv(indio_dev);
935
936 if (data->power_mode == US5182D_CONTINUOUS)
937 return us5182d_shutdown_en(data,
938 ~US5182D_CFG0_SHUTDOWN_EN & 0xff);
939
940 return 0;
941}
942#endif
943
944static const struct dev_pm_ops us5182d_pm_ops = {
945 SET_SYSTEM_SLEEP_PM_OPS(us5182d_suspend, us5182d_resume)
946 SET_RUNTIME_PM_OPS(us5182d_suspend, us5182d_resume, NULL)
947};
948
949static const struct acpi_device_id us5182d_acpi_match[] = {
950 { "USD5182", 0 },
951 {}
952};
953
954MODULE_DEVICE_TABLE(acpi, us5182d_acpi_match);
955
956static const struct i2c_device_id us5182d_id[] = {
957 { "usd5182", 0 },
958 {}
959};
960
961MODULE_DEVICE_TABLE(i2c, us5182d_id);
962
963static const struct of_device_id us5182d_of_match[] = {
964 { .compatible = "upisemi,usd5182" },
965 {}
966};
967MODULE_DEVICE_TABLE(of, us5182d_of_match);
968
969static struct i2c_driver us5182d_driver = {
970 .driver = {
971 .name = US5182D_DRV_NAME,
972 .pm = &us5182d_pm_ops,
973 .of_match_table = us5182d_of_match,
974 .acpi_match_table = ACPI_PTR(us5182d_acpi_match),
975 },
976 .probe = us5182d_probe,
977 .remove = us5182d_remove,
978 .id_table = us5182d_id,
979
980};
981module_i2c_driver(us5182d_driver);
982
983MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
984MODULE_DESCRIPTION("Driver for us5182d Proximity and Light Sensor");
985MODULE_LICENSE("GPL v2");
986
